This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X500-20, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAU replacement uses the same profile body, bore, stroke, force and SC-series mounting. It moves to the current CMSG / DMSG / EMSG sensor switches (the SU used CS1-B / DS1-B) and adds the SAUF valve-integrated option.
Airtac SUJ Adjustable Cylinder SUJ40X500-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X500-20 is a double-acting profile-type standard cylinder with a Ø40mm bore and 500mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X500-20, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke500 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X500-20
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SUJ Adjustable Cylinder SUJ40X500-20
The AirTAC SUJ40X500-20 is a double-acting double-rod profile cylinder that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 480-500 mm stroke via an external stop screw. The stop sets the end position but is not a load lock.
The direct replacement is the SAUJ40X500-20, matching the bore, stroke, force, port, and FA/LB mounting. Upgrading to the SAUJ moves you to current CMSG/DMSG/EMSG sensors from the legacy CS1-B/DS1-B.
Airtac SUJ Adjustable Cylinder SUJ40X500-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X500-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X500-20 |
| Bore size | Ø40 mm |
| Stroke | 500 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ40X500-20 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAUJ40X500-20 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUJ Adjustable Cylinder SUJ40X500-20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×500 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SU-family variants: SUD (double rod), SUJ (adjustable stroke) — each maps to its SAU equivalent (SUD→SAUD, SUJ→SAUJ). The current SAU line adds the SAUF valve-integrated option.
Where the Airtac SUJ Adjustable Cylinder SUJ40X500-20 Is Used
Variable Length Stops
Adjusting the extend stroke on-site by up to 20 mm to fine-tune material stop positions without changing the entire cylinder setup.
Tooling Clearance Tuning
Trimming the extend stroke to safely accommodate varying tooling heights or workpiece sizes on a shared fixture.
Dynamic Product Diverter
Shortening the extend stroke on the fly to deflect different package widths on a conveyor line.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X500-20 with the SAUJ40X500-20
To replace this discontinued model, specify the SAUJ40X500-20, which matches the 40 mm bore, 500 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. Because this unit lacks a magnet (-S), it cannot take a sensor; the SAUJ upgrade uses CMSG/DMSG/EMSG sensors instead of the old CS1-B/DS1-B. At 500 mm stroke, use external guides to prevent rod bending and side loads. The stop screw sets end position only; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X500-20
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S): sensor family CS1-B → CMSG
- ✓ Mounting reused (FA/FB/CA/CB/LB)
- ✓ Need a built-in valve? → SAUF
Airtac SUJ Adjustable Cylinder SUJ40X500-20 FAQ
Yes, the SUJ40X500-20 is discontinued. The direct replacement is the SAUJ40X500-20, which matches the 40 mm bore, 500 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw window is 20 mm, allowing you to shorten the 500 mm extend stroke down to 480 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X500-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X500-20 replacement — usually within 7-8 hours.